Going T9 to T11 means you are bypassing the 4 transistor driver plus the IRF510's.
T10 is before the IRF510's, T11 is after the IRF510's.
So I think you mean T9 to T10.
In the very informative post?
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/g/BITX20/message/51743Allison reports that the IRF510's might have a gain of 13dB at 30mhz.
So if we want 5W out, we need to have at least 250mW of power to drive those gates.
And the pre-driver only gives about 8mW? at (I assume) 30mhz.
Hence, I'd be surprised if getting rid of that driver stage is going to work for you.
At DC, the IRF510's don't take any power at all at the gates.
However, at 30mhz the story is quite different.
Jerry
On Sat, Sep 8, 2018 at 09:06 PM, jim wrote:
Well ..It shows T9 to T11 because I did on purpose bypass the 4 transistor dirver stage ... Maybe Ciss being what? couple hundred puf's ??? what is shown is exactly as it is Be aware I have NOT verified the (absolute) output level nor the spur level ..Just wanted to share the concept..Nothing more? I am not driving it with any power ....Just to see...? A triode with positive grid bias maybe?
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